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Aeroacoustic Experiments In The Nasa Langley Low Turbulence Pressure Tunnel
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720372608 Total Pages :46 pages Book Rating :4.3/5 (726 download)
Book Synopsis Aeroacoustic Experiments in the NASA Langley Low-Turbulence Pressure Tunnel by : National Aeronautics and Space Administration (NASA)
Download or read book Aeroacoustic Experiments in the NASA Langley Low-Turbulence Pressure Tunnel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A phased microphone array was used in the NASA Langley Low-Turbulence Pressure Tunnel to obtain acoustic data radiating from high-lift wing configurations. The data included noise localization plots and acoustic spectra. The tests were performed at Reynolds numbers based on the cruise-wing chord, ranging from 3.6 x 10(exp 6) to 19.2 x 10(exp 6). The effects of Reynolds number were small and monotonic for Reynolds numbers above 7.2 x 10(exp 6).Choudhari, Meelan M. and Lockard, David P. and Macaraeg, Michele G. and Singer, Bart A. and Streett, Craig L. and Neubert, Guy R. and Stoker, Robert W. and Underbrink, James R. and Berkman, Mert E. and Khorrami, Mehdi R.Langley Research CenterAEROACOUSTICS; LOW TURBULENCE; WIND TUNNEL TESTS; ACOUSTIC PROPERTIES; PRESSURE GRADIENTS; REYNOLDS NUMBER; WING FLAPS; BOUNDARY LAYER THICKNESS; VORTICES; AIRCRAFT NOISE; PHASED ARRAYS; PRESSURE DISTRIBUTION
Book Synopsis Aeroacoustic Experiments in the NASA Langley Low-Turbulence Pressure Tunnel by :
Download or read book Aeroacoustic Experiments in the NASA Langley Low-Turbulence Pressure Tunnel written by and published by . This book was released on 2002 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720634270 Total Pages :32 pages Book Rating :4.6/5 (342 download)
Book Synopsis NASA Langley Low Speed Aeroacoustic Wind Tunnel by : National Aeronautics and Space Administration (NASA)
Download or read book NASA Langley Low Speed Aeroacoustic Wind Tunnel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Langley Research Center Low Speed Aeroacoustic Wind Tunnel is a premier facility for model-scale testing of jet noise reduction concepts at realistic flow conditions. However, flow inside the open jet test section is less than optimum. A Construction of Facilities project, scheduled for FY 05, will replace the flow collector with a new design intended to reduce recirculation in the open jet test section. The reduction of recirculation will reduce background noise levels measured by a microphone array impinged by the recirculation flow and will improve flow characteristics in the open jet tunnel flow. In order to assess the degree to which this modification is successful, background noise levels and tunnel flow are documented, in order to establish a baseline, in this report.Booth, Earl R., Jr. and Henderson, Brenda S.Langley Research CenterAEROACOUSTICS; LOW SPEED WIND TUNNELS; WIND TUNNEL TESTS; JET AIRCRAFT NOISE; NASA PROGRAMS; BACKGROUND NOISE; TEST FACILITIES; NOISE INTENSITY; NOISE REDUCTION; FLOW CHARACTERISTICS; MICROPHONES; DATA PROCESSING; ACOUSTIC MEASUREMENT; JET FLOW
Book Synopsis Aeroacoustic Measurements by : Thomas J. Mueller
Download or read book Aeroacoustic Measurements written by Thomas J. Mueller and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes recent developments in aeroacoustic measurements in wind tunnels and the interpretation of the resulting data. The reader will find the latest measurement techniques described along with examples of the results.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721779383 Total Pages :36 pages Book Rating :4.7/5 (793 download)
Book Synopsis Model-Scale Aerodynamic Performance Testing of Proposed Modifications to the NASA Langley Low Speed Aeroacoustic Wind Tunnel by : National Aeronautics and Space Administration (NASA)
Download or read book Model-Scale Aerodynamic Performance Testing of Proposed Modifications to the NASA Langley Low Speed Aeroacoustic Wind Tunnel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-24 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were performed on a 1/20th-scale model of the Low Speed Aeroacoustic Wind Tunnel to determine the performance effects of insertion of acoustic baffles in the tunnel inlet, replacement of the existing collector with a new collector design in the open jet test section, and addition of flow splitters to the acoustic baffle section downstream of the test section. As expected, the inlet baffles caused a reduction in facility performance. About half of the performance loss was recovered by addition the flow splitters to the downstream baffles. All collectors tested reduced facility performance. However, test chamber recirculation flow was reduced by the new collector designs and shielding of some of the microphones was reduced owing to the smaller size of the new collector. Overall performance loss in the facility is expected to be a 5 percent top flow speed reduction, but the facility will meet OSHA limits for external noise levels and recirculation in the test section will be reduced. Booth, Earl R., Jr. and Coston, Calvin W., Jr. Langley Research Center NASA/TM-2005-213534, L-19093
Book Synopsis Nasa Langley Low Speed Aeroacoustic Wind Tunnel by : Nasa Technical Reports Server (Ntrs)
Download or read book Nasa Langley Low Speed Aeroacoustic Wind Tunnel written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-07 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Langley Research Center Low Speed Aeroacoustic Wind Tunnel is a premier facility for model-scale testing of jet noise reduction concepts at realistic flow conditions. However, flow inside the open jet test section is less than optimum. A Construction of Facilities project, scheduled for FY 05, will replace the flow collector with a new design intended to reduce recirculation in the open jet test section. The reduction of recirculation will reduce background noise levels measured by a microphone array impinged by the recirculation flow and will improve flow characteristics in the open jet tunnel flow. In order to assess the degree to which this modification is successful, background noise levels and tunnel flow are documented, in order to establish a baseline, in this report.
Book Synopsis Model-Scale Aerodynamic Performance Testing of Proposed Modifications to the Nasa Langley Low Speed Aeroacoustic Wind Tunnel by : Earl R. Booth
Download or read book Model-Scale Aerodynamic Performance Testing of Proposed Modifications to the Nasa Langley Low Speed Aeroacoustic Wind Tunnel written by Earl R. Booth and published by BiblioGov. This book was released on 2013-07 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were performed on a 1/20th-scale model of the Low Speed Aeroacoustic Wind Tunnel to determine the performance effects of insertion of acoustic baffles in the tunnel inlet, replacement of the existing collector with a new collector design in the open jet test section, and addition of flow splitters to the acoustic baffle section downstream of the test section. As expected, the inlet baffles caused a reduction in facility performance. About half of the performance loss was recovered by addition the flow splitters to the downstream baffles. All collectors tested reduced facility performance. However, test chamber recirculation flow was reduced by the new collector designs and shielding of some of the microphones was reduced owing to the smaller size of the new collector. Overall performance loss in the facility is expected to be a 5 percent top flow speed reduction, but the facility will meet OSHA limits for external noise levels and recirculation in the test section will be reduced.
Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Modifications and Calibration of the Langley Low-Turbulence Pressure Tunnel by : Robert J. McGhee
Download or read book Recent Modifications and Calibration of the Langley Low-Turbulence Pressure Tunnel written by Robert J. McGhee and published by . This book was released on 1984 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experiment and Analysis on the Flow Process Dynamics of the NASA-Langley Eight-foot Transonic Pressure Tunnel by : Ping Tcheng
Download or read book Experiment and Analysis on the Flow Process Dynamics of the NASA-Langley Eight-foot Transonic Pressure Tunnel written by Ping Tcheng and published by . This book was released on 1977 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploratory Study to Induce Fan Noise in the Test Section of the NASA Langley Full-scale Wind Tunnel by :
Download or read book Exploratory Study to Induce Fan Noise in the Test Section of the NASA Langley Full-scale Wind Tunnel written by and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Modifications and Calibration of the Langley Low-Turbulence Pressure Tunnel by : Robert J. McGhee
Download or read book Recent Modifications and Calibration of the Langley Low-Turbulence Pressure Tunnel written by Robert J. McGhee and published by . This book was released on 1984 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Instability and Control of Massively Separated Flows by : Vassilis Theofilis
Download or read book Instability and Control of Massively Separated Flows written by Vassilis Theofilis and published by Springer. This book was released on 2015-01-03 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the outcome of the international meeting on instability, control and noise generated by massive flow separation that was organized at the Monash Center, in Prato, Italy, September 4-6, 2013. The meeting served as the final review of the EU-FP7 Instability and Control of Massively Separated Flows Marie Curie travel grant and was supported by the European Office of Aerospace Research and Development. Fifty leading specialists from twelve countries reviewed the progress made since the 50s of the last century and discussed modern analysis techniques, advanced experimental flow diagnostics and recent developments in active flow control techniques from the incompressible to the hypersonic regime. Applications involving massive flow separation and associated instability and noise generation mechanisms of interest to the aeronautical, naval and automotive industries have been addressed from a theoretical, numerical or experimental point of view, making this book a unique source containing the state-of-the-art in separated flow instability and its control.
Book Synopsis An Aeroacoustic Study of Micro-tab on Airframe Noise Reduction by : Chiawei B. Kuo
Download or read book An Aeroacoustic Study of Micro-tab on Airframe Noise Reduction written by Chiawei B. Kuo and published by . This book was released on 2008 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel by : Paul T. Soderman
Download or read book Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel written by Paul T. Soderman and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
